Control system



Feb. 19, 1946 R. R. STEVENS ET AL CONTROL SYSTEM Filed Jan. 29, 1944 2Sheets-Sheet l INVENTORS 121% R. Stevens ii: 6. up .6112 ORNE Pia kwtuMEGSQ ms Si Feb: 19, 1946. R. R. STEVENS EIAL CONTROL SYSTEM 7 2Sheets-Sheet 2 Fil ed Jan. 29, 1944 fig. 5

INVENTORS' Roy R. dtevens firif/gifiraon ATTORNEY Patented Feb. 19, 19462,395,202 CONTROL SYSTEM Roy R. Stevens, Forest Hills, and Erik G.Erson,

Wilkinsburg, Pa., assignors to' The Westinghouse Air Brake Company,Wilmerding, Pa., a corporation of Pennsylvania Application January 29,1944, Serial No. 520,256

27 Claims.

This invention relates to control systems and more particularly to afluid pressure control systern for controlling, in a desired sequence, aplurality of different operations such as starting, stopping andreversing of a reversible internal combustion en ne.

Certain internal combustion engines, such as of the Diesel type, arearranged to run in either direction, the direction being determined byadjustment of the valve timing or valve gear which may control in propersequence a supply of compressed air to the cylinders for starting theengine to turn, and a supply of fuel to the cylinders, under control ofinjectors or the like, for causing the engine to run.

One object of theinvention is the provision of an improved controlsystem for controlling, in proper sequence, various operations such asrequired for stopping, starting and reversing an engine of the typeabove described.

Another object of the invention is the provision of such a systemarranged to be controlled from a remote control station by fluid underpressure.

Another object of the invention is the provision of a pneumatic systemfor controlling the starting, stopping and reversing of a Diesel engine,which system, upon operation to reverse the engine, initially acts tocut off the supply of fuel to the engine, then causes reversal of thevalve gear or timing gear of the engine followed by supplying compressedair to the engine for braking same in case it is not already stopped,and which air upon stopping of the engine is immediately effective tostart the engine turning in the opposite direction, and which systemprovides for resupplying fuel to the engine after and only after theengine is placed in motion in the new direction.

Other objects and advantages will be a parent from the following moredetailed description of the invention.

In the accompanying drawings; Fig. 1 is a diagrammatic view, partly insection and partly in outline, of a control system embodying theinvention; Fig. 2 is a plan view of a portion of an operators controldevice shown in vertical section in Fig. 1; Figs. 3 and 4 are partialsectional views of the operators control device taken on the lines 3-3and 4-4, respectively, in Fig.

1; Fig. 5 is a sectional view of a fuel interlock valve device taken onthejline 5-5 in Fig. 1; Fig. 6 is a vertical sectional view takenthrough a control valve device shown partly in side elevation and partlyin vertical section in Fig. 1;

Fig. 7 is a vertical sectional view of a starting air supply valvedevice shown in elevation in Fig. 1; andFig. 8 is a sectional View of adouble check valve device several of which are shown in elevation ofFig. 1.

Description In the drawings, the reference numeral I indicates a portionof one end of. a crank shaft of a reversible internal combustion engine,and reference numeral 2 indicatesa portion of one end of a cam shaft forsaid engine. The cam shaft may be driven in proper phase with the crankshaft by meshing gears 3 and 4 for operating conventional engine valvemechanisms (not shown) and fuel injection mechanisms (not shown) in awell known manner to permit the engine to be started by compressed airfor operation in either direction of rotation, to for instance drive aship ahead or astern. To provide for the different directions ofoperation, the cam shaft may have the usual forward cams (not shown) toprovide for operation of the engine in one or an ahead direction andreverse cams (not shown) to provide for operation in the reverse or anastern direction and may be shiftable longitudinally relative to thecrank shaft for rendering either the forward or the reverse camseffective for controlling the engines valve or timing gear in a wellknown manner. In Fig. 1 of the drawings the cam shaft is shown in whatmay be considered a position to provide for operation of the engine inan astern direction, and maybe shifted by a lever 5 from the asternposition-to an ahead position in which said lever may occupy a positionsuch as indicated by a dot and dashline 5a.

The reference numeral 6 indicates a fuel control member or shaft whichmay be rockable to control conventional fuel injectors (not shown) tovary the amount of fuel supplied to the engine for controlling the speedor torque of the engine or for stopping the engine. A lever l isconnected to rock shaft 6. The lever 7 and shaft 6 may have a fuel cutoff position in which they are shown in Fig. 1 for cutting off thesupply of fuel to the engine to stop same, and may be adjustable out ofsaid position to a fuel supply position, such as indicated by a dot anddash line 8, to supply fuel to the engine to provide for operation ofthe engine at idling speed, and may be further adjustable in the samedirection for increasing the speed or torque of the engine.

The adjustment of lever 1 and shaft 6 to vary the engines speed may beeffected in any desired manner, as by a conventional speed governor (notshown) driven by the engine and adjusted manually for limiting the speedor torque of the engine.

The reference numeral 9 indicates an engine starting air valve devicearranged to be operated by fluid under pressure supplied through a pipeIll for supplying starting air from a supply pipe II to a pipe l2 whichmay convey it to the starting valves (not shown) of the engine forsupply to the engine cylinders (not shown) to.

place the engine in motion in the direction determined by the positionof the cam shaft 2.

As shown in Fig. 7, the starting air valve device 9 may comprise a valvel3 fOr controlling communication between pipes I l and II, a valve l4for controlling communication between pipe [2 and an atmospheric portl5, and a piston I6 for controlling said valves and having at one side achamber l1 open to pipe l0, and having at the opposite side a chamber l8open to atmosphere through port l and containing a spring l9 underpressure and acting on said piston. In operation, when fluid underpressure is supplied to pipe ID, in a manner which will later bedescribed, such pressure will flow into chamber 1 l and therein act tomove piston It for seating valve I4 and opening the valve iii to therebysupply starting air from pipe I l to pipe l2 for starting the engine.When fluid is released from pipe I 0 and thus from chamber [1, spring 9will open valve l4 and permit the closing of valve l3 by a spring 20 tocut off the supply of starting air to pipe 12 and to release air fromsaid pipe to the atmosphere.

The invention comprises means for controlling the reversing of the valvetiming or gear of the engine as by shifting of the cam shaft 2 to eitherits astern or ahead position. and for controlling operation of thestarting air valve device 9. and operation of the fuel control shaft 6to cut ofl the sup ly of fuel to the engine as reouired for the controlof the starting. stopping and reversing of the engine, in view of whicha more detailed showing in the drawings of the intricate well knownstructure of the engine, and a len thy description thereof are deemedunnecessary in the present a plication to a clear understanding of theinvention and hence are dispens d with.

For shifting the cam shaft 2 to either of its two different positionsthere is provided a power c linder 26 containing a piston 21 having arod 28 extendin through one end o said cylinder and connected to one endof a link 29. The other end of this link may be connec ed to the camshaft as through the lever 5. The piston 21 has at one side a chamber 30connected to a control pipe 3| and at the opposite side a chamber 32connected to a control pine 33. The two control pipes 3| and 33 lead toa control valve device 34 mounted on one end of the power cylinder 25and containing two fluid ressure sunolv and release valve device 35 and36 for controlling the supply and release of fluid under pressure to andfrom said pipes, respectively.

Both of the valve devices 35 and 36 may be identical in construction,each comprising. as shown in Fig. 6, a. fluid pressure supply valve 31contained 'in a chamber 38 and arranged. to control communicationbetween said chamber and a chamber 39 bv way of an aperture 40. A s ring4! in chamber 38 acts on the valve 31 for closing same. The valve 31 hasa stem 42 extending through aperture 40 into chamber 33 wherein it isprovided on its end with a fluid pressure release valve 43 arranged tocooperate with a seat provided on a plunger 44 for controllingcommunication between chamber 35 and a chamber 45 at the opposite sideof the plunger. The plunger 44 is connected by a stem 48 to a guide 49which is slidably mounted in the device above said plunger.

Chamber 45 in each of the valve devices 35 and 35 is in constantcommunication with the atmosphere through a cavity 45 and a passage 41'.Chamber 39 in the valve device 35 is connected to pipe 3| and thecorresponding chamber in the valve device 35 is connected to pipe 33.The supply valve chamber 38 in both valve devices 35 and 35 is open to apipe 54 arranged to be supplied with fluid under pressure in a mannerwhich will be later described.

A lever 55 is pivotally mounted on a pin 5! disposed midway between theguides 49 in the two valve devices 35 and 3E, and said lever ha twooppositely arranged arms 52, each engaging the outer face of one of saidguides. With the lever 55 in a vertical position as shown in Fig. 1, thetwo arms 52 position the guides 49 and thereby plungers 44 as shown inFig. 6, in which position the respective-release valves 43 are inengagement with said plungers and act through the stems 42 to open theconnected supply valves 3! so that chambers 30 and 32 at opposite sidesof the power piston 2'! are both open to the fluid pressure supply pipe54, and the piston 21 will be subject on opposite sides to fluid at thesame degrees of pressure. Under this condition piston 21 will remain ina fixed position. Since the right-hand side of the piston has a greaterarea subjected to the pressure of fluid than has the left-hand side, thepiston will have a tendency to move in the direction toward theleft-hand, but the inherent resistance of the piston and of the severalparts operatively associated therewith to such movement is sufficient tohold the piston stationary at this time.

Movement of lever 50 in a counter-clockwise di rection, as viewed inFig. 1, will actuate the valve device 35 to open the supply valve 31thereof to a greater degree and permit movement of guide 49 and plunger44 in the valve device 36' in an upwardly direction under the pressureof fluid in chamber 39 and action of a spring 53 and to an extent topermit closure of the supply valve 31 in said device and opening of therelease valve 43 which will permit release of fluid under pressure fromchamber 39 and thereby chamber 32 at the left hand side of the powerpiston 21 by way of pipe 33. With the pressure of fluid in chamber 32thus reduced and the pressure of fluid in chamber 30 maintained bysupply of fluid from the supply pipe 54, the piston 21 will be subjectedto a differ- 'ential in forces which will move it and thereby lever 50and cam shaft 2 to the positions shown in the drawings to provide forrunning of the engine in a direction to cause astern movement of a ship.After the piston 21 has been moved to the position shown in Fig. 1 ofthe drawings, return of lever 50 to a vertical position will again openchamber 32 to the fluid pressure supply pipe 54 while maintainingchamber 30 open to said pipe, due to which the opposing fluid pressureson the piston'will become balanced to substantially remove all actuatingforce on the piston.

Rocking of the lever 50 in a clockwise direction. as viewed in Fig. 1,from its vertical position. will actuate the valve device 36 to reducethe pressure of fluid in chamber 30 while maintaining chamber 32 open tothe fluid pressure supply pipe 54 through the valve device 35. Underthis condition a difierential in fluid pressures will be proasoaao evided on piston 21 for moving same in the direc-- tion of the right-handto therebyactuate the lever to the ahead position indicated by the dotand dash line to, and thi 'movement of said lever will shift the camshaft 2' to the position for causing operation of the engine in areverse direction to cause movement of the ship ahead. After the piston21 obtains its right-hand position, the return of lever '52 to itsvertical position will again balance and substantially remove allactuating force on said piston which will then remain in the position inwhich it was moved.

For controlling operation of the control Valve device 34 to position thepiston 21, a pilot device "55' is mounted on one side of the powercylinder 26. This device comprises a piston 56 having at one side achamber 51 connected to a control pipe 58 and having at the oppositeside a chamber 59 connected to a control pipe to. A piston rod 6!extending through a suitable bore in the casing into chamber 59 has oneend connected to the piston 56. The other end of the piston rod 6| isconnected to a member 62 which i slid'ably mounted in a slot 63 providedin a lever 64 one end of which is pivot'ally connected to the piston rod28. 'The opposite end or lever 64 is pivotally connected to one end of atie rod 6'5 the opposite end of which is pivotally connected to leverto.

Operation of th'epilo't piston 56 is controlled by fluid under pressureupplied-through either one of the control pipes 58 or 6! when the othercontrol pipe is open to the atmosphere, which conditioning of said pipeswill be hereinafter described. When fluid under ressure is supplied topipe 53 and thence to the pilot piston chamber 51, with chamber 59 andpipe 6!] open to the atmosphere, the pilot piston 56, power piston 2'!and lever 50 will assume the positions in which they are shown in Fig. 1as will be apparent from the description to follow.

Now let it be assumed that pipe 53 is opened to the atmosphere and thatfluid under pressure is "supplied to pipe 60. This pressure of fluidacting in chamber 59 on the pilot piston 56 will move same in thedirection of the right-hand, and due to the relatively greaterreluctance to movement of the power piston 21, this movement of thepilot piston will rotate lever. 64 about its pivotal connection with thepower piston rod 28 and actuate the tie rod 65 to rock lever 58 in thecontrol device 34 in a clockwise direction for thereby releasing fluidunder pressure from the power piston chamber 30 while maintaining thefluid pressure in the power piston 2'1 will rock lever 5 to the aheadposition indicated by the dot and dash line to for correspondinglypositioning the cam shaft 2 in the engine.

Movement of the cam shaft 2 to its astern posttion by movement of thepower piston 21 to the left-hand end of chamber 32 may be accomplishedby fluid under pressure supplied to pipe 58 upon release of fluid underpressure from pipe 60 in amanner which will be apparent from the abovedescription.

After the power piston 21 has completed its stroke to move the cam shaft2 to either its ahead position or its aster n position, it may bedesirable to open both chambers and 32 to the atmosphere for therebyrelieving the power piston of the pressure of fluid. This may beaccomplished by the use of a relief valve device 6Q for controlling thesupply of fluid under pressure to ipe 54 from "a pipe It which may beconstantly supplied with fluid under pressure from any suitable sourcein a manner which will be brought out hereinafter.

The relief valve device 69 may be identical to the starting air valvedevice 9 above described and shown in Fig. 7, the pipe 54 beingconnected to the chamber between the two valves I3 and I l, the pipe 70being connected to the chamber containing valve 53 and the piston iii insaid power piston chamber 32. As a result, the power piston 21 will movein the direction of the righthand and during the initial portion or suchmovement the pilot piston 56 will move therewith under pressure offluid-in chamber '59. After a certain degree of such movement the pilotpiston 56 will contact the right-hand end of chamber 57 and therebyprevent further movement of said piston. Continued movement of the powerpiston 21 will then rock lever 64 about its connection with the pilotpiston rod GI and thereby actuate the tie rod 65 to rock lever 59 in thecontrol device 34 back toward its neutral or vertical position, whichposition will be attained at substantially the time the power piston 2-!attains the righthand end of chamber 3!]. Thus with the pilot piston 56at the right-hand end of the chamber 57, the power piston 21 will becaused to assume a corresponding position in the power cylinder 26, andthe control device 34 will act to equalize the opposing fluid pressuresacting on the opposite sides of said power piston. This movement of thedevice being controlled through a pipe H. The pipe H is connected to apipe 12 which in turn is connected to the side outlet of a double checkvalve device 13. The end outlets of the double checkvalve device 13 areconnected to pipes 58 and 60. 7

AS shown in Fig. 8 the double check valve de- Vice [3 may comprise acasing containing a double checkvalve M arranged to controlcommunication between the two end connections and the side outlet;opening communication between the side outlet and the one end connectionand closing communication between said side outlet and the othercndconnection in one position of said valve reversing the connectionsbetween the side outlet and the end connections in the other position ofsaid valve.

It will thus be seen that with the structure just described, wheneverfluid under pressure is supplied to either pipe 58 or pipe or .forefiectin'g operation of the pilot piston 55 fluid will also be suppliedthrough pipe 1! to the release valve device 69 for actuating same toopen communication between fluid pressure supply pipe 113 and pipe 54leading to the control device 34, while upon subsequent release of fluidunder pressure from either control pipe 58 0r 59 for relieving the pilotpiston 56 for actuating force, which will be later described, thecorresponding release of fluid from pipe H and the release valve device69 will cause operation of said device to close communication betweenpipes it? and 54 and open pipe 54 to the atmosphere for therebyreleasing fluid under pressure from opposite sides of the power piston2! past the open supply Valves in the valve devices 35 and 36 and thencethrough pipe 54.

In order to prevent operation of the starting air valve device 9 tosupply air for braking the engine and subsequently starting the enginein a reverse direction until after the cam shaft 2 has been shifted tothe position for conditioning the engines valve gear to provide foroperation of the engine in such direction, there is assoelated with thecam shifting arrangement, including the power piston 21, a reverse andstart interlock valve device I5, which may be mounted directly on thecontrol valve device 34.

The interlock valve device 15 may be structurally identical to thecontrol valve device 34 with but one exception, which will be laterdescribed, and therefore comprises two fluid pressure supply and releasevalve devices I6 and 1! which are structurally identical to the valvedevices 35 and 39 above described and which are arranged to control flowof fluid under pressure from pipe I9 to interlock pipesfIS and 19,respectively and to control the release of fluid un der pressure fromsaid pipes. The two fluid pressure supply and release valve devices I6and I? are arranged to be operated by oppositely extending arms 89 of alever 8|, which lever differs from the lever 59 in the valve device 34only in that it carries a spring seat 82 and a friction shoe 93 which isarranged to slidably contact an interior surface of the device. Aninitially compressed coil spring 84 encircling the lever 8| isinterposed between the seat 82 and friction shoe 93 and acts to presssaid shoe into contact with the surface of the casing with such force asto hold the lever 8| in any position to which it may be moved againstopposing pressures of fluid acting on piston 44 in either one of thevalve devices IE or I! when said piston in the other device is subjectin chamber 39 to atmospheric pressure.

One end of a rod 85 is connected to the power piston rod 28. Theopposite end of rod 85 is provided with a slot, and extending into thisslot is a pin 85 which is secured in the outer end of lever 8|. The rod85 is operative upon movement of the power piston 21 to the positionshown in Fig. 1 to move lever 8! to the position in which it is shown,and is operative upon movement of the power piston 21 to its oppositeposition to move the lever 8| to a corresponding position as indicatedby a dot and dash line Ma. The slotted or lost motion connection betweenthe rod 85 and pin 89 provides for movement of the power piston 21relative to the lever 8! until the piston approaches the end of itsstroke in either direction. Thus upon movement of the power piston 21 tothe position shown in the drawings the interlock valve device I willmaintain a supply of fluid under pressure from pipe I9 to pipe I9 and atthe same time maintain pipe 18 open to the atmosphere until said pistonsubstantially attains said position. Likewise, upon movement of thepower piston 2'! from this position to the opposite or right hand end ofits cylinder, the interlock valve device I5 will maintain a supply offluid under pressure from pipe I9 to pipe I8 and maintain pipe I9 opento the atmosphere until said piston substantially completes its stroke,at which time the interlock valve device will operate to open pipe I9 tothe atmosphere and open pipe I9 to the fluid pressure supply pipe '19.

The reference numeral 99 indicates an operators fluid pressure controlvalve device which may be located immediately adjacent the engine or atany remote control station. This device comprises a body 9| and a cover92a mounted on the body, and in said body there are disposed what may becalled an astern run valve device 92 and an ahead run valve device 93for controlling, through pipes 58 and 59, operation of the structureincluding power piston 21 to selectively position the cam shaft 2 for aselected direction of operation of the engine, in the manner abovedescribed. The body 9| also contains an ahead start valve device 94 andan astern start valve device arranged to control through pipes 99 and91, respectively, operation of the starting air valve device 9, and astop valve device 98 for effecting stopping of the engine in a mannerand under conditions which will be later brought out.

The two run valve devices 92 and 93 are located side by side in the body9i with their axes arranged horizontally, while the valve devices 94,

95 and 98 are arranged side by side with their axes arranged vertically.All of these valve devices may be identical in construction eachcomprising a fluid pressure supply valve I9I contained in a chamber I92and arranged to control communication between said chamber and a chamberI93 through an opening I94 provided through a seat which said valve isarranged to engage for closing such communication. A spring I95 inchamber I92 acts on the valve [9| to urge it to its seated position. Thevalve MI is connected by a stem I99, which loosely extends through theopening I94 into chamber I93, to a plunger I9! slidably mounted in asuitable bore in the body, said plunger being of substantially the samearea as the seat on the valve l9l and subject on one face to pressure offluid in chamber I93 and on the opposite face to atmospheric pressure ina chamber I93 which is open to the atmosphere by way of a passage I99.The valve Illl, stem I99 and plunger I9'I are provided with an axialbore I99a open at one end to chamber I92, while a release valve H9disposed in chamber I98 is arranged to control communication between theopposite end of said bore and the latter chamber. The release valve I I9is provided with a plunger HI extending to the exterior of the body.

In the illustration all of the valve devices 92 to 95 and 99 aredisposed in the same vertical plane, and extending over the plungers IIIof the valve devices 94, 95, and 99 and arranged in the same verticalplane is a horizontally disposed hollow control shaft H5 which issuitably journaled at its opposite ends in the cover 92a. A plunger H6is slidably mounted in the control shaft H5. The left hand end of thisplunger projects outwardly beyond one end of the shaft above theplungers III of the valve devices 92 and 93. A cam shaft H'I, telescopedover and secured to the control shaft H5, bears at opposite ends againstthe cover for holding both shafts against axial movement.

The two shafts H5 and H! are provided through one side with alignedlongitudinall extending slots I Ilia and I Hot, respectively, and theplunger H5 is provided with a like aligned slot and through these slotsextends the lower end portion H9 of an operators control lever H9 whichis pivotally mounted on a pin I29 arranged transversely of the axes ofsaid shafts and carried by a lug I2I projecting upwardly from the camshaft H1. The portion H8 of the control lever ends within the cam shaftH1 and in its end there is provided a slot I22 within which is disposeda transversely extending pin I23 which is secured to plunger H6. It willbe seen that with this structure, rocking of the operators control leverH9 about the pin I29 in a direction longitudinally of the cam shaft II!will shift the plunger H5 in one or the opposite direction lengthwisewithin the control shaft H5 and relative to the cam shaft H'I, whilemovement of said lever in a direction about the axis of said cam shaftwill rotate said cam shaft without reflecting iendwise wmovement iOf:plunger M16.

The :control lever :I I9 extends :through a (slot in cover 9M,whiohaslot :is ismshaned and arranged as to guide zthe lever in itsidifierent directions of movement. This :slot is :shown in detail inRig. land may comprise :a central :portion 124 which allows movement sci.theilever to ineither direction from a ineutral :position, :in :it isshown in jl llg. 12, ilengthwise of the control shaft 1:15 for actuatingplunger :lil-fi. =ne end 0f;s1ot I124 is open .to a slot :|.-25:arrangedat righm :angles to aprovide :for movement of the lever :out of .slot124 in conedhrecticn :for rocking of the camshaft H51 in a like:direction. 'EEthe opposite :endzof :slot 42% is open to a. slot M6arranged parallel to slot 1.25 but extending .in the opposite direction.The :control lever H19 may have .zflve different operating'positionslinithese slots including intermediate the llength of slot [.24 n fStopr-positi'on in which :said :lever .isrshovvn in Fig. 2. The :otherpositions :of who :lever :are shown in 2 :by dotted .circles designatedroy appropriate legends, it :heing noted that the ilever has an fhheadstart position at the outer end of shit 125 and an 'Ahead mm" position:in :said slot adjacent said Si-art" wposition. 'Oppositely arranged Llsternstart and 5E. positions are provided in slot I26. I

:body 1-9I has an :exterior lug 1. 2:8 which extends :hetween andlhevond the outer 'ends of the plnngers .l Isl of :the two :controldevices T92 :and 9:3. ,A lever slid fulcrumerl in one :end on a 4310"which :is carried iby the lug i228 has its :opposite end operativelyconnected :to plunger I 1-16., while intermediate its ends, it providedwith a raised rporticn which engages mlunger :Lll of the valve device:92. n lever v1.3a rfulcrumeiiintermediate its :ends on a pin 2113-2carried :by :the hig 1228 :is operatively connected :at one :end toplunger llfi while its opposite :endv is arranged for contact withplunger ,llll :of the valve device .93.

The parts are :so constrnctedand arranged with "the =lever I I8 infs'top position, the ttxvo levers 1'29 :and al 31 she :so positioned assto :aliow of the release valves :i ll 6 and closing of the supply valves1-134 :of'the two valve devices .92 :and 93. Chambers H12 in the atWOvalvedevices .92 and :93 are open respectively 'to control ip pes 58 and6.0 so that with lever M9 .in Stop position the chambers :at theopposite sides of the pilot piston 56 will both Joe opened to theatmosphere. Movement-of lever 4J9 :toits Ahead ran position is arrangedto actuate lever 413i to close the release valve H0 and open the supplyvalve H11 in the ahead run valve device 93 to thereby open'communicationbetween control pipes 26!! and 18. Movement of the controllever M9 :to the Astern run position will operate lever .129 to seatrelease valve I I0. and open supply valve It! in the control. device 92to thereby connect control mine 55 to :control pipe 1+9. The two controldevices 92 and as will be operated as just described Joy movement of theloperatoris control lever ZIIIFB to-e'ilther one \or the opposite end ofslot 12 and without further movement into the adjacent .slot 125 :01 426to the positions indicated hiifi ig. 2 by :the legends Run, but in theillusoration :this further movement is necessary tier reasons which willlater be brought out.

" camshaft will?! is provided with three lea-ms i3 4, I35 and I36arranged to control respectively the iplnngeis H4 of the three controldevices 94., '95 and B8. The ram 134 is provided for actuatimg plungerAIM "to close the release valve 11 HI and open the :suppl-yvalve H] l inthe ahead start valve device .94 the operators control ilever M9 is .inthe in-head :start position ron'lv, nd its nermit these "valves :toassume the positionsshown Fig. 31 in other positions f said lever. .lDhecam A35 :is :provided for closing valve 1| H) and opening valve *llllllin the zastem start valve device 95 when the operators control lever H9(the Astern start position-only, :and \to permit mov ment :of {thevalves to the [positions shown in the drawings in all other positions:of said lover. The cam l'fiiis provided for closing the release valve Hll and opening the supply valve :Htl inrthe stop valve device as withthe operatoris control lever in the fStop position only and to permit:closure of the supply valve 120;! and openhig of the release valve:l'tll in other positions of .said lever. It will be noted that theposition of loam 1-36 is met changed by movement of the opera'torZ-slever :I 19 .in the slot 1&4 :and it is therefore necessary the two Runpositions he at topposite .of slot .124 orderithatin such positions thesupply valve ztflil will be seated and the release valve 1MB opened thesto valve devineiflB.

interlock .lcipe 18 connected )to the interlock "valve device H5 isconnected to chamber J53 both :the ahead run valve device 93 and theastern star-it valve device :95. gripe 7 3 from the interlock valvedevice 5-5 connected r0 chamber M .in the astern valve device 2 and Fillthe ahead start valve device 34. Ghamher no.3 in the stop valve device:98 is connected by 231 :pine MB to the side outlet of .a double checkvalve device 413;! the opposite ends of which are respectively connectedto pipes Fill and 19.. lllhis double check valve device may be identicalto that shown in .Eig. :8 and above described whereby when ifluidissupplied lto either pipe 18 or 1.9 40 such ifluid will sflow do pipe1:4-8 and thence to the stop valve device :98. Theichamher 102.1:1 thestop valve device 98 is connected to a pipe I42 leading to one :end of adouble check valve device 4-43 which may be of the same construction asthe 45 double-check valveidevioe Ml. opposite end of this check valvedevice M3 "is connected to pipe -12, and the side outlet of the valvedevice is open toa pipe M4 whichis-oonneoted through .a onevvayflowcheck valve device 14.5 and .apipe 1a 150 to-a tuelcutoiT-device M6. 4

.Thefuel cutofi device 146 may comprise 2. .casing containing a ,piston.41?! having .at one side a chamber M8 'open to pipe 1 44a and having.at theopposite side anonpressure chamber 143 con-- '515 taming a springI-BD which is under pressure and acting on piston 54'! for urging same.in the direetioh toward the right hand end of chamber 143 when pipe:l-Ma is void of fiuid pressu-re. The piston M7 .is provided with a rod.15.] extending =59 through chamber I49 and provided in its outer endwith a .slot through which extends a pm [52 secured ,in the end of thefuel control shaft operating lever 1. Upon supply of fluid underpressure to -.c-hamher M8 -piston ii 41 will actuate the 65 rod 45-!.intooontact \with pin 1 52 and move lever I to the fuel cutoff,position as shown in the drawings. This :position may .be defined bycontact between said riston and the casing. Upon release of fluid underpressure from chamber MB 7 the spring 156 will return piston All] to itsnormal position in contact with the right hand end of chamber M8 tothereby .pull I-lever 7 out of its duel cutoff position .to its fuelsupplypos'ition indicated Joy the .dot and dash line .8. With the piston4 4-1 its normal position the slot in the piston rod II provides foradjustment of the lever further in a clockwise direction, as by aconventional governor above mentioned, for increasing the speed ortorque of the engine which however is immaterial to the invention. Itwill now be seen that upon operation of the operators control lever I I9to supply fluid under pressure to either of the control pipes 58 or 60to cause change in position of the cam shaft 2 for reversing the engine,or upon supply of fluid under pressure to pipe I42 by operation of thestop control device 98 with the operators control lever in -Stopposition, such fluid will be supplied to pipe I44 and thence to the fuelcutoff device I46 for actuating lever 1 to turn the fuel control shaft'6 to its fuel cutoff position for cutting off the supply of fuel to theengine to allow stopping thereof.

The check valve I45 is arranged to prevent release of fluid underpressure from the fuel cutoff device I46 upon release of fluid underpressure from pipe I44 under a condition to be later described. In orderto release fluid under pressure from the fuel cutoff device I46 topermit the supply of fuel to the engine a release valve device I56 isprovided. This device comprises a casing having a chamber I51 which isin open communication with pipe I44a and which contains a valve I58 foropening communication between said chamber and a chamber I59 which isopen to the atmospherethrough a port I60. Chamber I59 is located at oneside of a piston I6I and located at the opposite side of the piston is apressure chamber I62 arranged to receive fluid under pressure from apipe I63. When fluid under pressure is supplied to chamber I62, pistonI6I will operate to open valve I58 against the opposing pressure of aspring I64 in order to release fluid under pressure from pipe M411 andthus from the fuel cutoff device I46. When piston chamber I62 is void offluid pressure spring I64 will close the valve I58.

Pipe I63 connects the release valve device I56 for controlto adirectional interlock valve device I61 which is arranged to operate uponreversing of the direction of operation of the engine to prevent thesupply of fuel to the engine until after the engine is started to turnby compressed air in the new direction. This interlock valve devicecomprises (Fig. 5) a casing containing a double check valve I68 arrangedto control communication between pipe I63 and two passages I69 and I10.In one position of the double check valve, the pipe I63 will be open topassage I10 and disconnected from passage I69 as shown in Fig. 5 of thedrawings. In the other position of the double check valve, passage I10will be disconnected from pipe I63. and said pipe will be connected topassage I69. The passages I69 and I10 lead respectively to an aheadvalve control device HI and to an astern control valve device I12.

The control valve devices HI and I12 are identical in structure, eachcomprising a supply valve I13 contained in a chamber I14 and arranged tocontrol communication between said chamber and a chamber I15. A springI13a in chamber I14 acts on the supply valve I13 for seating said valve.The chamber I15 contains a release valve I16 in constant contact with astem projecting from the supply valve I13 and having a stem I11 slidablymounted in a plunger I18 which in turn is slidably mounted in a bore inthe casing. The casing is provided with an annular recess I19aencircling the plunger I18 and containing a ring seal I19 contractedinto sealing engagement with the peripheral surface of said plunger forpreventing leakage of fluid under pressure from chamber I15 past saidplunger. The bore in which the fluted stem I11 of the release valve I16is mounted opens to a larger bore I the outer end of which is closed bya plug I80a and the bore I80 is open to the atmosphere through anotherbore IBI and one or more ports I82 provided in said plug. A plunger I83loosely mounted in the bore containing the release valve stem I11engages said stern and extends into bore I80 where it is provided withan enlarged head I84 which may be of smaller diameter than bore I80 toallow flow of fluid from one side to the opposite side. Interposedbetween the head I84 and the adjacent end of plug I89a is a spring I85which is under pressure. The pressure of spring I85 against the head I84and thereby the release valve I16 is less than the pressure of springI13a against the supply valve I13, so that spring I13a can hold thesupply valve I13 seated against the reaction of spring I85 which isprovided to move plunger I18 out of seating engagement with said releasevalve.

The casing of the interlock device I61 is provided midway between theouter ends of the two plugs I89a with a depending lug I66 carrying a pinI81 upon which is fulcrumed a lever I88 having two oppositely arrangedarms I89 each of which is disposed over the end of one of the plugs IBM.In the end of each arm I89 is secured an adjustable actuating screw I90engaging the respective plug I89a. With the parts in the position inwhich they are shown in Fig. 5 the screws I90 are so adjusted as topermit movement of the two supply valves I13 against their seats underthe action of springs H311 and to permit movement of the two plungers I18 by springs I85 out of contact with the respective release valves I16.

The lever I88 is also provided with a depending lever arm I9I, the endof which is loosely accommodated in a slot I92 provided in and open tothe periphery of a friction disc I93. This disc is carried on a plungerI94 which is slidably mounted in a bore provided in a casing I65(Fig. 1) which is adapted to be rigidly supported with respect to theengine and to in turn support the friction disc in coaxial relation withthe end of the engine crank shaft I. The plunger I94 is also operativein the capacity of a piston for moving the friction disc into frictionalcontact with the end of the crank shaft I, and to effect such movement,is subject at its inner end to pressure a fluid in a chamber I96 whichis open to pipe I0 leading to the starting air valve 9. Pipe I0 is alsoopen to the side outlet of a double check valve device I91, like thecheck valve device shown in Fig. 8, and which has its opposite endsconnected to the pipes 96 and 91.

Operation Let it be initially assumed that the operators control leverH9 is in Stop position and that the engine has been stopped fromprevious operation in an astern direction, under which condition, thecam shaft 2 will be positioned for astern operation and the power piston21, pilot piston 56, control valve device 34 and interlock valve device15 will all be positioned as shown in Fi 1.

With the operators control lever in Stop" position, the ahead and asternrun control valve devices 92 and 93 will be in positions opening pipes58 and 60 to the atmosphere, whilethe ahead and astern start controlvalve devices 94 and 85 will be in the positions opening the controlpipes 96 and 91 to the atmosphere. In the Stlop" position of lever 119,the stop control device 98 will however be in the position shown forsupplying fluid under pressure, supplied b the interlock valve device 15to pipe 18 and the check valve device I41 and thence to pipe I40, topipe I42 from which it will flow through the. double check valve deviceI43, pipe I44 and the check valve I 45 to the fuel cutout device I46 tomaintain the fuel control lever 1 and shaft 6 in the fuel cutoffposition for maintaining the engine stopped.

Now let it be assumed that the operator desires to restart the engine inthe astern direction. To accomplish this he will move lever II9 to theAstern start" position, which will cause operation of the stop valvedevice 98 to vent fluid under pressure from pipe. I42 and thereby frompipe H4, and at the same time will actuate the astern run valve device92 to open control pipe 19 to pipe 58, The control pipe 19 is at thistime void of fluid under pressure. The cam shaft 2 and the cam shiftingmechanism including the power piston 21 and pilot piston 56 are alreadyin their astern positions causing operation of the interlock valvedevice 15 to open pipe 19 to the atmosphere so that operation of theastern run valve device 92 will be without effect. The ahead run valvedevice 63 remains in the condition opening pipe 60 to the atmosphereupon this operation of the operators lever I I9. With both pipes 56 and66' thus open to the atmosphere and with fluid under pressure ventedfrom pipe I 42 by the stop valve device 98, the pipe I44 will bemaintained at atmospheric pressure but the check valve I45 will maintainthe fluid pressure in the cut off valve device I46 previousl suppliedwith the operator's lever H9 in Stop position, in order to maintain thefuel control shaft 6 in its fuel cutoff position.

In the Astern start position of lever II9, the astern start valve device95 will also be operated to supply fluid, supplied to pipe 18 by theinterl'ock valve device 15, from said pipe to pipe 91 through which itwill flow to the directional interlock valve device I61 and also throughthe double check valve device I91 to pipe I. Fluid under pressure thusprovided in pipe It will actuate the starting air valve device 9 tosupply fluid under pressure to pipe I2 for starting the engine to turnin. the direction determined by the position of the cam shaft 2, and atthe same time, fluid supplied to pipe III will cause piston I94 to movethe friction disc I93 into frictional contact with the end of the crankshaft I, After the crank shaft starts turning in the chosen directionunder the pressure of starting air, it will turn the friction disc I93in a clockwise or "Astern direction as indicated by the legend in Fig.5, for thereby rocking the lever I88 in a counterclockwise directionabout its fulcrum pin I81, Since the pressure of spring I13a exceedsthat of spring I85, this movement of lever I88 will act, in the asternvalve. device I12, to initially move the plunger I18 relative to therelease valve I16 until said release valve is seated, and then saidplunger will act through said release valve to open the supply valve I85against spring I13a. Fluid under pressure will then how from pipe 91 topassage I16 and thence to pipe I63 for actuating the release valvedevice I=56 to open pipe I44a to the atmosphere for venting fluid underpressure from the fueli'nterlock device I46 to render spring I50thereineffective to move the fuel control lever 1 and shaft 6 from theirfuel, cutofi. position to their fuel supply position. It will thus beseen that the supply of fuel to the engine is maintained cutoff untilafter the engine has started to turn in the selected direction, due tooperation of the fuel interlock device I61 being dependent upon thedirection of rotation of the engines crank shaft I, but after the enginestarts to turn in the selected direction said interlock device willoperate to supply fuel to the engine to provide for running thereof.

After the engine has been started in the astern direction and theinterlock device operates to supply fuel to the engine, the operatorwill move his control lever from the Astern start position to the Asternrun position'to permit operation of the astern starting valve device 95to release fluid under pressure from pipe 91, This will result inoperation of the starting air valve device 9 to out oh. the supply ofstarting air to the engine and Will also remove the force on piston I94pressing the disc I93 against the crank shaft. When the pressure betweendisc I93 and the end of the crank shaft is thus removed, the lever I88will be returned to the position shown in Fig. 5 under the action ofspring H31 (in the valve device I 12) to seat the supply valve I13,followed by the action of spring I- to move the plunger I78 out ofseating engagement with the release valve I16. With the release valveI16 thus open, pipe I63 will be open to atmosphere and the parts of therelease valve device I56 will then return to the position in which theyare shown in Fig. 1 due to the action of spring I64.

Now let it be assumed that instead of restarting the engine in. thedirection it had previously been run, that the operator desire to startand run the engine in the reverse direction which require reversalv ofthe cam shaft 2 from the Astern position shown in Fig. 1.

To thusv start and run the engine in the ahead direction, the operatorwill move lever I!!! from Stop position to the Ahead start position.This movement will effect operation of the stop valve device 98 to openpipe I 42 to the atmosphere but the fuel interlock device I46 will bemain tained in its fuel cut off position by fluid pressure retained inpipe I-44a by check valve I 45. Movement of the lever H9 through theslot I25 to the Ahead start position will however actuate the ahead runvalve device 93 to supply fluid under pressure from pipe 18, which issup plied with fluid under pressure from the supply pipe 18 by way ofthe interlock valve device 15, to pipe BI! and at the same time thismovement of the operators control lever will operate the ahead startvalve device 94 to open communication between pipes 19 and 96. Pipe 19is at this time open to the atmosphere through the interlock valvedevice 15.

The pressure of fluid thus supplied to pipe will flow through the doublecheck valve device 13 to pipe 12 and thence through the double checkvalve device I43 and I44 to maintain the fluid pressure in the fuel cutoff device I46 to hold the fuel supply to the engine out off, and at thesame time will flow from pipe 12 through pipe. 1! and actuate the reliefvalve device 69 to supply fluid under pressure from the supply pip 1!)to the control valve device 34. At the same time, the fluid pressuresupplied to pipe 66 will also cause operation of the pilot piston. 55and thereby of the. power piston 21 to move the cam shaft 2 to vitsahead position in which the actuating lever 5 will occupy the positionindicated by the: dash and dot line a, and when said lever attains thisposition the position of lever 8| in the interlock valve device willhave become reversed to permit operation of the valve device 16 thereinto open pipe 18 and thus the connected pipe 66 to the atmosphere whichwill relieve the pilot piston 56 of pressure of fluid. This release offluid under pressure from pipe 69, which does not occur until after thecam shaft 2 has been shifted to its new position, also results inrelease of the fluid under pressure from pipe I44, but the fluidpressure will be maintained in the fuel cut off device I46 by checkvalve I45, so as to maintain the fuel supply to the engine cut off. Therelease of fluid pressure from pipe 90 also results in release of fluidpressure from pipe 1i, so as to cause operation of the relief valvedevice E9 to relieve the power piston of pressure of fluid after saidpiston has completed its operation of reversing the position of the camshaft 2.

At the same time that the valve device 16 in the interlock valve device15 is operated to release fluid under pressure from pipes 19 and 69, thevalve device 11 will be operated to open communication between the fluidpressure supply pipe 19 and pipe 19, and fluid thus supplied to thelatter pipe will flow through the ahead start valve device 94 to pipe 96leading to the fuel interlock device I61 and also through the doublecheck valve device I91 to the starting air valve device 9 and to pistonchambe I96. The starting air valve device 9 will then operate to supplyair to the engine for causing it to start turning in the directiondetermined by the new position of the cam shaft 2. After the engine thusstarts to turn, operation of the friction disk I93, pressed into contactwith the end of the crank shaft I by pressure of fluid in chamber I96,will rock the lever I88 in a clockwise direction (Fig. 5) for therebyoperating the valve device Hi to supply fluid under pressure from pipe96 to pipe I63 for actuating the relief valve device I56 to vent fluidunder pressure from pipe I l-4a, whereupon the fuel cut off device I46will operate to pull the lever 1 from the fuel cutofl position to thefuel supply position to allow running of the engine.

on fuel. After the engine starts to run on fuel the operator will returnlever II9 from the Ahead start position to the Ahead run position forreleasing fluid under pressure from pipe 96. This will cause operationof the starting air valve device 9 to cut off the supply of starting airto the engine and relieve disc I93 of pressure against the end of crankshaft I, wher upon the parts of the interlock valve device I6: and ofthe release valve device I56 will return to the position in which theyare shown in Figs. 5 and 1, respectively, as will be apparent fromprevious description.

If the engine is operating in the ahead direction and the operatordesires to reverse the direction of operation of the engine, he willmove the control lever II9 from the Ahead run position to the Asternstart position which will actuate the astern run valve device 92 tosupply fluid under pressure from pipe 19, which is supplied with fluidunder pressure with the cam shaft 2 in its ahead position, to pipe 58leading to chamber 51 at one side of the pilot piston 56. At the sametime fluid supplied to pipe 58 will flow through the double check valvedevice 13 to pipe 12 and thence through pipe H to actuate the reliefvalve device 69 to open communication between the fluid pressure supplypipe 16 and pipe l4 Fluid supplied to pipe 12 will also flow through thedouble check valve device I43 to the fuel cutoff device I46 for causingoperation thereof to cut off the fuel supply to the engine whereby theengine may clecelerate and stop.

The pilot piston 56 will respond to pressure of fluid supplied throughpipe 58 to cause operation of the power piston 21 to move the cam shaft2 from its ahead position to its astern position and to also actuate theinterlock device 15 to the position shown in the drawings for releasingfluid under pressure from pipe 19 and for supplying fluid under pressureto pipe 13 leading to the astern start valve device 95. This release offluid pressure from pipe 19 relieves the pilot piston 56 of pressure offluid and causes operation of the relief valve device 69 to relieve thepower piston 21 of pressure of fluid, and alsov communication betweenpipes 18 and 91 with the operators lever I I9 in the Astern startposition, the fluid under pressure supplied to said valve device throughpipe 18 will be supplied through pipe 91 to the interlock valve deviceI61 and also through the double check valve device I 91 to the startingair valve device 9 and to piston chamber I96. The starting air valvedevice 9 will then operate to supply air to the engine cylinders, and ifthe engine has not yet come to a stop from its previous direction ofrunning, the reversed condition (if the cam shaft 2 will render such aireffective on the engines pistons to promptly stop the engine. Thepressure of fluid in chamber I96 will move the friction disk I93 intocontact with the end of the crank shaft I, but in case the crank shafthas not yet come to a stop, said disk will turn in the'directionindicated by the legend Ahead in Fig. 5 and thereby operate the valvedevice I1I to open pipe 96 to passage I69. Pipe 96 is at this timevented by way of the ahead start valve device 94 in the operatorscontrol valve device so that this operation of the interlock valvedevice I61 will have no effect upon the condition of the fuel cutoff,

device I46. I

sure of air supplied by the starting air valve device 9 is immediatelyeffective to start the engine turning in the reverse direction. Withdisc I93 of the directional control device I61 in contact with the endof the crank shaft I, the device immediately detects this change indirection of rotation of crank shaft I and actuates the lever I88 tooperate valve device I12 to open communication between pipe 91 and pipeI63.v Fluid supplled. to pipe 91 will then flow to pipe I63 and actuatethe release valve device I56 for relieving the fuel cutoff device I46 offluid pressure whereupon said device will operate to pull the fuelcontrol lever 1 a d shaft 6 from their fuel cutout position to theirfuel supply position for supplying fuel to the engine to provide forrunning of the engine. After the engine is running on fuel in thereversed direction as determined by the Astern start position of theoperators lever, said lever will be turned to the Astern run positionfor releasing fluid under pressure from pipe 91 to cause cutting off ofthe supply of starting air to the engine and operation'of the interlockdevice I61 torelease fluid under pressure from the release valve deviceI56.

It willlnow be noted that in reversing the directionof operation of theengine, the supply of fuel to the engine is first cut off, the valvegear or timing of the engine is then reversed and this may occur beforethe engine. stops turning, and after the valve timing is reversed,starting air is supplied to the engine which, with the engine stillturning in the previous direction, will act first to bring the engine toa stop and then start the engine turning in the reverse direction, .following which fuel Will again be supplied to the engine to cause runningthereof in the new direction.

The operation of the apparatus to reverse the direction of operation ofthe engine from astern to ahead in response to movement of the operators control lever from the Astern run position to the Ahead startposition will be apparent from the above description.

Whenever the operator desires to stopthe engine, regardless of thedirection of operation, he will move the control lever H 9 back to Stopposition for actuating the stop valve device 98 to supply fluid underpressure to pipe I42 and thence through the double check valve device143, pipe 144 and check valve I45 and pipe I44a to the fuel cutoffdevice M6. The cutoff device We will thereby be operated to cut of; thesupply of fuel to the engine whereupon the engine will stop with the camshaft 2 and the control parts therefore including the pilot piston 56and power piston 21 remaining in the condition previously assumed.

Summwry It will now be seen that the improved system provides forcontrol pneumatically, from a, control station which may be either localor remote, of a plurality of different operations in a desired sequence,such as incident to starting, stopping, and reversing of a reversibleinternal combustion engine. Reversing of the engine is accomplished by afluid motor embodying a power piston and control means thereforincluding a fluid operated pilot piston and means operable by saidmotor, which latter means is thus conditionable in accordance with theengine valve gear or timing, for relieving said pistons of pressure orfluid at the completion of the reversing operation. This meansconditionable in accordance with the conditon of the valve gear alsocontrol the starting of the engine so as to prevent starting power frombeing applied to the engine until after the valve gear has beenconditioned to provide for operation of the engine in the desireddirection. The starting power may be fluid under pressure, and thesupply thereof to the engine immediately upon reversing of the valvegear also provides for braking of the engine in case the engine has notalready been stopped, so as to more promptly stop the engine and beimmediately eiiective upon such stopping to start the engine turning inthe opposite direction.

The system includes automatic means for com trolling the fuel supply tothe engine. This automatic means includes an interlock device controlledby the direction of rotation of a part of the engine, such as thecrankshaft, to prevent the supply of fuel to the engine until after ithas started to turn in the selected direction, at which time said meansoperates automatically to supply fuel to the engine.

The control system embodies a number of flexible fiuid connections orpipes which connect the operators control device to the other controldevices which will be associated directly with the engine, and thispermits locating the operators control device at any desired stationwithout regard to the location of the engine. Such connections may bereadily accomplished and are not subject to wear and therefore willnever require adjustments due to Wear, and thus constitute a relativelyinexpensive and simple yet proven effective and efficient type ofcontrol.

Having .now described our invention What we claim as new and desire tosecure by Letters Patent is:

l. A system for controlling the starting of a reversible internalcombustion engine and for also controlling the valve gear for saidengine which gear is adjustable to provide for operation of .said enginein either one direction or in the opposite direction, comprising incombination, a fluid motor operable by fluid under pressure to adjustsaid gear to provide for reverse operation of said engine, startingmeans fortsaid engine, an operators control device operative to supplyfluid under pressure to actuate said motor, and means controlling saidsupply of fluid under pressure and operation of said starting means andoperable automatically upon'said adjustment of said valve gear by fluidunder pressure to release the actuating fluid on said motor and toeffect operation of said starting means.

'2. A system for controlling the starting of a reversible internalcombustion engine and for also controlling the valve gear for saidengine which gear is adjustable to provide for operation of said enginein either one direction or in the opposite direction, comprising incombination, a fluid motor operable by fluid under pressure to adjustsaid gear to provide for reverse operation of saidengine, starting meansfor said ongine, an operators control device operative to supply fluidunder pressure to actuate said motor, and means controlling said supplyof fluid under pressure and said starting means controlled by said motorand operable upon said adjustment of said valve gear by said motor torelease actuating fluid from said motor and to effect operation of saidstarting means.

3. A system for controlling the starting of a reversible internalcombustion engine and for also controlling the reversing valve gear forsaid engine which gear is adjustable to provide for operation of saidengine in either one direction or in the opposite direction, comprisingin combination, a fluid motor operable by fluid under pressure to eithera first position, or to a second position for adjusting said gear toprovide tor operation of said engine in either said one direction or insaid opposite direction, starting means for said engine, an operatorscontrol device having first and second positions corresponding to thoseof said motor and operable upon movement to either position to efiect asupply of fluid under pressure to said motor to effect movement thereofto the corresponding position, and means conditionable in accordancewith the adjustment of said valve gear for controlling said supply offluid under pressure and for also controlling said starting means andoperable upon movement of said control device to either one of itspositions other than the position corresponding to that of said motor toprovide for said supply of fluid under pressure and to prevent operationof said starting means during operation of said motor, and operable withsaid control device and motor in corresponding positions to relieve saidmotor of pressure of fluid and to also effect operation of said startingmeans.

4. A control system for controlling the starting of a reversibleinternal combustion engine and for also controlling reversing means forsaid engine which is adjustable to determine the direction of operationof said engine comprising in combination, a motor operable by fluidunder pressure to either one of two positions to selectively adjust saidreversing means, an operators control device having positionscorresponding to those of said motor and operable upon movement toeither of its positions to supply fluid to said motor to effectcorresponding positioning thereof, starting means operable by fluidunder pressure to efiectstarting of said engine, and interlock meanscontrolled by said motor operable upon positioning thereof correspondingto the position of said control device to supply fluid under pressure toeffect operation of said starting means and operable with said motor outof the position corresponding to that of said control means to preventsupply of fluid under pressure to said starting means, said interlockmeans comprising valve means arranged to control the supply of fluid tosaid motor and being operable to cut off such supply and to releasefluid under pressure from said motor upon movement of said motor to theposition corresponding to that of said control device.

5. A control system for a reversible internal combustion engine havingreversing means adjustable .to provide for running of said engine ineither one direction or in the reverse direction comprising incombination, reversing piston means movable to one position by fluidunder having one position for effecting a supply'of fluid under pressureto one of said chambers to effect corresponding positioning of saidpiston means and having a second position for effecting a suppressureefiective in one chamber to adjust said reversing means to provide foroperation of said engine in one direction and movable to a secondposition by fluid under pressure effective in another chamber to adjustsaid reversing means to provide for operation of said engine in thereverse direction, starting means operable to effect starting of saidengine, manual control means having ahead run and start positions foreffecting a supply of fluid under pressure to said one chamber andhaving astern run and start positions for effecting a supply of fluidunder pressure to the said another chamber, means controlled by saidpiston means operable automatically upon movement of said piston meansinto either one of its different positions to provide for operation ofsaid starting means and operable to prevent operation of said startingmeans during movement of said piston means, said manual control meanscomprising starting control means operable in each of said startpositions to provide for operation of said starting means upon movementof said piston means to the position corresponding to, that of saidmanual control means and operable to prevent or stop operation of saidstarting means in the said run positions.

6. A control system for a reversible internal combustion engine havingreversing means adjustable to provide for running of said engine ineither one direction or in the reverse direction comprising incombination, reversing piston means movable to one position by fluidunder pressure effective in one chamber to adjust said reversing meansto provide for operation of said engine in one direction and movable toa second position by fluid under pressure effective in another chamberto adjust said reversing means to provide for operation of said enginein the reverse direction, an operators control device ply of fluid underpressure to the other chamber to effect corresponding positioning ofsaid piston means, starting means operable by fluid under pressure toeffect starting of said engine, and being rendered non-operable uponrelease of fluid under pressure, said operator's control devicecomprising starting control means, and interlock means controlled bysaid piston means and cooperative with said starting control means forcontrolling the supply of fluid under pressure to said starting means,said interlock means being operable upon movement of said piston meansinto either one of its positions, and upon operation of said startingcontrol means, in response to movement of and with said operator'scontrol device in the corresponding position to effect a supply of fluidunder pressure to said starting means, and being operable duringmovement of said piston means between its positions to eflect a releaseof fluid under pressure from said starting means, said operators controldevice being operable to effect operation of said starting control meansto release fluid under pressure from starting means with said pistonmeans in either of its positions.

7. A control system for a reversible internal combustion engine havingreversing means adjustable to provide for running of said engine ineither one direction or in the reverse direction comprising incombination, reversing piston means movable to one position by fluidunder pressure effective in one chamber to adjust said reversing meansto provide for operation of said engine in one direction and movable toa second position by fluid under pressure effective in another chamberto adjust said reversing means to provide for operation of said enginein the reverse direction, an operators control valve device having aheadrun and start positions for effecting a supply of fluid under pressureto one of said chambers and astern run and start positions for effectinga supply of fluid under pressure to the other chamber, starting controlmeans operable by fluid under pressure to effect starting of said engineand rendered ineifective upon release of such fluid pressure, interlockmeans controlled by said piston means, and valve means associated withsaid operators control valve device, said interlock means and said valvemeans cooperating for controlling said starting means being operablewith said operators control valve device in either start position andwith said piston means correspondingly positioned to effect a supply offluid under pressure to said starting control means, said interlockmeans being operable with said piston means out of a positioncorresponding to that of said operators control valve device to eifect arelease of fluid under pressure from said starting control means, andsaid valve means being operable to eifect a release of fluid underpressure from said starting control means with said operators controlvalve device in the run positions thereof.

8. A system for controlling the starting, reversing and fuel supply to areversible internal combustion engine, comprising in combination,reversing means conditionable to render said engine operable in eitherone direction or in the opposite direction, starting control means forstarting said engine, fuel control means for controlling the supply offuel to said engine, reverse accuses control means" operable to effectoperation of said reversingimeans to condition said engine for operationin the reverse direction andfor at the same time effecting operation ofsaidfuel control means tocut on the supply of fuel to said engine, meanscontrolled by said reverse control means and operable upon conditioningof said engine to operate in said reverse direction to effect operationof said starting control means, and operable to prevent operation ofsaid starting control means during operation of said reversing means tocondition said engine for operation in said reverse direction, and meanscooperable with a rotatable part of said engine upon operation of saidengine in said reverse direction to effect operation of said fuelcontrol means to supply fuel to said engine.

9. A system for controlling the starting, reversing and supply ofifuelto a reversible internal combustion engine, comprising in combination,reversing means adjustable by fluid under pressure to render said engineoperable in either one direction or in the opposite direction, fuelcontrol means operable by fluid under pressure to cut off the supply offuel to said engine and operable upon release of such fluid pressure tosupply fuel to said engine, starting control means operable by fluidunder pressure to effect starting of said engine, an operators controldevice movable to aposition for supplying operating fluid to saidreversing means and to said fuel control means and for opening a fluidpressure supply communication to said starting control means, valvemeans having-a condition providing for said supply of fluid underpressure to said reversing means and fuel control means and for openingsaid communication to atmosphere and being operable upon operation ofsaid reversing means to render said engine operable in the reversedirection, to out off the supply of fluid to and to release fluid underpressure from said reversing means and to at the same time supply fluidunder pressure to said communication to effect operation of saidstarting means; means operable to maintain the fluid pressure in saidfuel control means upon release of actuating fluid from said reversingmeans, and interlock means conditionable jointly by pressure of fluidsupplied to said communication and by turning of a rotatable part ofsaid engine to release fluid under pressure from said fuel control meansonly upon rotation of said part in the direction determined by saidreversing means, said operator's control device being movable to"another position for releasing fluid under pressure from saidcommunication.

1 0. A system for controlling the starting, reversing and fuel supply toa reversible internal combustion engine, comprising in combination,reversing means conditionable to render said engine operable in eitherone direction or in the opposite direction, starting contro1- means forstarting said engine, fuel control means for controlling the supply offuel to said engine, reversing control :means operable to effectoperation of said reversing means to condition said engine for operationin a reverse direction and for at the same time effecting operation ofsaid fuel controlmeans to cut off the supply of fuel to said engine,interlock means conditionable to operate in accordance with thedirection of rotation of a rotatable part of said engine to controloperation of said fuel control means and operable with said part turning.in the direction determined by saidreversing control means to effectoperation or said fuel control means to supply fuel to said engine andoperable to prevent operation ofsald fuel controlmeans to supply fuel tosaid engine with the part turning in the opposite direction or stopped,means controlled by said reversing control means operable uponconditioning of said reversing means to provide for operation of saidengine in the reverse-direction, to effect operation of said startingcontrol means and to condition said interlock means for response toturning of said part and being also operable to prevent operation ofstarting control means and to render said interlock means non-responsiveto said part during operation of said reversing means to reverse saidengine.

11. A system ifor controlling the starting of an internal combustionengine and for also controlling the supply of fuel to said engine,comprising in combination, starting control means operable to initiateturning of said engine, fuel control means operable to control the fuelsupply to said engine, operators control means operative to effectoperation of said starting control means, interlock means arranged forcontrol by turning of said engine and operable upon turning of saidengine to effect operation of said fuel control means to supply fueltosaid engine and operable with said engine stopped to cut oif thesupply of fuel to said engine, and means operable upon operation of saidoperators control device to effect operation of said starting controlmeans to condition said interlock means for response to turning of saidengine.

12. A system for controlling the starting of an internal combustionengine and for also controlling the supply of fuel to said engine,comprising in combination, starting control means operable by fluidunder pressure to effect starting of said engine, fuel control meansoperable by fluid under pressure and turning of a rotatable part of saidengine to effect a supply of fuel to said engine,

and an operators control device operative to supply fluid under pressureto effect operation of said starting control means and fuel controlmeans simultaneously.

13. A system for controlling the starting of an internal combustionengine and for also controlling the supply of fuel to said engine,comprising in' combination, starting control means operable by fluidunder pressure to effect starting of said engine and renderedineffective upon release of fluid under pressure, fuel control meansoperable upon engagementwith a rotating part of said engine to effect asupply of fuel to said engine and operable with said engine stopped orupon disengagement with said rotating part of said engine to preventsaid supply of fuel to said engine, piston means operable by fluid underpressure to effect engagement between said fuel control means and saidrotating part of said engine and upon release of such fluid underpressure disengagement, and an operators control device operative tosimultaneously effect either a supply of fluid under pressure to saidstarting control means and piston means or a release of fluid underpressure from said starting control means and piston means.

14. A system for controlling the starting and stopping of an internalcombustion engine and for also controlling a supply of fuel to saidengine, comprising in combination, starting control means operable toeffect starting'of said engine to turn, an operators control devicehaving a stop position and being movable to a start'position to effectoperation of said starting control means, fuel control means operable toeither cut off the supply of fuel to said engine to effect stoppingthereof or to provide fuel to said engine to permit running thereof,mechanism operable when subject to pressure of fluid and turning of saidenglue to effect operation of said fuel control means to supply fuel tosaid engine and operable to pre-- vent such supply of fuel to saidengine when not subject to pressure of fluid, said operator's controldevice being operable in said start position to subject said mechanismto pressure of fluid and being operable in said stop position to releasefluid under pressure from said mechanism.

15. A system for controlling the reversing of a reversible internalcombustion engine, the supply of fuel to said engine and the starting ofsaid engine, comprising in combination, reversing means for reversingthe direction of operation of said engine, fuel control means forcontrolling the supply of fuel to said engine, starting control meansfor starting said engine, an operator's control device operable toeffect operation of said reversing means, means controlled jointly bysaid reversing means and operators control device and operable uponoperation of said reversing means to provide for reversal of directionof operation of said engine, to effect operation of said startingcontrol means to start said engine, and other means controlled jointlyby said reversing means and turning of a rotatable part of said enginefor controlling said fuel control means and operable to effect operationof said fuel control means to cut off the supply of fuel to said engineduring operation of said reversing means to reversesaid engine and withsaid engine stopped and conditionable by said reversing means uponcompletion of the reversing operation thereby and by rotation of saidpart of said engine to provide for supply of fuel of said engine.

16. A system for controlling the reversing of a reversible internalcombustion engine, the supply of fuel to said engine, and the startingof said engine by compressed air, comprising in combination, reversingmeans for reversing the direction of operation of said engine, fuelcontrol means operable by fluid under pressure to cut off supply of fuelto said engine and upon release of such fluid pressure t provide forsupply of fuel to said engine, starting control means operable by fluidunder pressure to supply compressed air from starting said engine, anoperator's control device having a stop position and operable therein torelease fluid under pressure from said starting control means and tosupply of fluid under pressure to said fuel control means, saidoperators control device being movable from said stop position to astart position for effecting operation of said reversing means toreverse the direction of operation of said engine, means controlledjointly by said reversing means and op erators control device in thestart position thereof and operable upon operation of said reversingmeans to provide for reversal of direction of operation of saidengine tosupply fluid under pressure to said starting control means, and othermeans operable by fluid pressure supplied to effect operation of saidstarting control means, to respond to rotation of a rotatable part ofsaid engine to release fluid underpressure from said fuel control meansand operable with said engine stopped to provide for fluid pressurebeing effective in said fuel control means.

1'7. A system for controlling the starting, reversing and fuel supply toa reversible internal combustion engine, comprising in combination,starting control means, reversing'means operable by fluid under pressureto reverse the direction of operation of said engine, fuel control meansoperable by fluid under pressure to cut off the supply of fuel to saidengine and operable upon release of fluid under pressure to provide forfuel being supplied to said engine, an operators control device having astop position for supplying fluid under pressure to said fuel controlmeans and being movable to a start position to cut off said supply offluid under pressure to said fuel control means and to supply fluidunder pressure to said reversing means, interlock means operable uponoperation of said reversing means to reverse the direction of operationof said engine to effect operation of said starting control means, meansoperable to maintain said fuel control means in condition cutting offthe supply of fuel to said engine with said control device in said startposition, other means responsive jointly to operation of said interlockmeans and turning of said engine to effect operation of fuel controlmeans to provide for supply of fuel to said engine, the said other meansbeing operative to prevent op eration of said fuel control means toprovide fuel to said engine with said engine stopped or operating in adirection the reverse of that provided for by said reversing means.

18. A system for controlling the starting, reversing and fuel supply toa reversible internal combustion engine, comprising in combination,starting control means, reversing means operable by fluid under pressureto reverse the direction of operation of said engine, fuel control meansoperable by fluid under pressure to cut off the supply of fuel to saidengine and operable upon release of fluid under pressure to provide forfuel being supplied to said engine, an operators control device having astop position for supplying fluid under pressure to said fuel controlmeans and being movable to a start position to cut off said supply offluid under pressure to said fuel control means and to supply fluidunder pressure to said reversing means, means providing for supply offluid under pressure from said reversing means to said fuel controlmeans, interlock means operable upon operation of said reversing meansto reverse the direction of operation of said engine, to out off thesupply of fluid under pressure to said reversing means and to supplyfluid under pressure to effect operation of said starting control means,means operable to maintain the fluid pressure in said fuel control meansupon cutting off the supply of fluid under pressure to said reversingmeans, and other means responsive jointly to operation of said interlockmeans and turning of said engine to release fluid under pressure fromsaid fuel control means, the said other means being operative to preventrelease of fluid from said fuel control means with said engine stoppedor turning in the direction the reverse of that provided for by saidreversing means.

19. A system for controlling the starting of and supply of fuel to aninternal combustion engine, comprising in combination, starting controlmeans operable by fluid under pressure to effect starting of saidengine, fuel control means operable by fluid under pressure to cut-offthe supply of fuel to said engine, an operators control device having astop position for supplying fluid under pressure to said fuel controlmeans, a start position for effecting a supply of fluid under pressureto said starting control means and a run position for releasing fluidunder pressure from said starting control means and being operable insaid run and start positions to cut off said supply of fluid underpressure to said fuel control means, means operable to maintain saidfuel control means in the position cutting off the supply of fuel tosaid engine in the start position of said control device, and meansconditioned by pressure of fluid supplied to said starting controlmeans, to operate upon rotation of said engine in response to operationof said starting control means to effect operation of said fuel controlmeans to provide fuel to said engine.

20. A system for controlling the starting and supply of fuel to aninternal combustion engine, comprising in combination, starting controlmeans operable by fluid under pressure to effect starting of saidengine, fuel control means operable by fluid under pressure to cut offthe supply of fuel to said engine and operable upon release of fluidunder pressure to provide for supply of fuel to said engine, anoperators control device having a stop position for supplying fluidunder pressure to said fuel control means, a'start position foreffecting a supply of fluid under pressure to said starting controlmeans and a run position for releasing fluid-under pressure from saidstarting control means and beingoperable in said run and start positionto cut off said supply of fluid under pressure to said fuel controlmeans, means operable to maintain fluid under pressure in said fuelcontrol means upon movement of said operators control device out of saidstop position, and means conditioned by pressure of fluid supplied tosaid starting control means to operate upon rotation of said engine inresponse to operation of said starting control means to effect releaseof fluid under pressure from said fuel control means.

21. A control system for controlling the starting, stopping andreversing of a reversible internal combustion engine and for alsocontrolling the supply of fuel to said engine, comprising in.

combination, starting control means operable by fluid under pressure foreffecting starting of said engine, reversing means selectively operableby fluid under pressure to provide for operation of said engine ineither one direction or in the opposite direction, fuel control meansoperable for fluid under pressure to cut off the supply of fuel to saidengine, an operators control device having, forward and reverse startpositions for supplying fluid under pressure to said reversing means toeffect operation thereof to provide for operation of said engine in,respectively, either a forward direction or a reverse direction andbeing also operable in said'positions to open communication forsupplying fluid under pressure to said starting control means, saidreversing means also controlling said communication and cooperating withsaid control device to prevent supply of fluid under pressure to saidstarting control means during operation of said reversing means and toprovide for such supply upon conditioning of said reversing means toprovide for operation of'said engine in the selebted direction, saidoperators control device also having forward and reverse run positionsfor releasing fluid under pressure from said starting control means, anda stop position for supplying fluid under pressure to said fuel controlmeans and being operable in the start and run positions to cut off thesupply of fluid under pressure to said fuel control means, meansoperable to maintain said fuel control means in the condition cuttingoff the fuel to said engine with said control device in said startpositions, and interlock means conditionable by fluid under pressuresupplied to operate said starting control means, to operate uponrotation of said engine in the direction determined by said reversingmeans to release said fuel control means to provide for supply of fuelto said engine, said interlock means being operable with said enginestopped or turning in a direction the reverse of that which saidreversing means is adjusted for to prevent release of said fuel controlmeans.

22. A system for controlling the starting, stopping, and reversing ofand the supply of fuel to a reversible internal combustion engine,comprising in combination, reversing means at said engine selectivelyoperable by fluid under pressure to provide for operation of said enginein either one direction or in the opposite direction, starting anoperators lever having a stop position and at one side thereof an aheadstart position and an ahead run position and at the opposite side anastern start position and an astern run position, said valve devicefurther comprising valve means. selectively operable by said lever inthe different positions thereof for controlling said reversing means,starting control means and fuel control means.

23. A system for controlling the starting, stopping and reversing of andthe supply of fuel to a reversible internal combustion engine,comprising, in combination, reversing means at said engine selectivelyoperable by fluid under pressure to provide for operation of said enginein either one direction or in the opposite direction, starting controlmeans at said engine operable by fluid under pressure to effect startingof said engine, fuel control means at said engine operable by fluidunder pressure to cut oil the fuel supply to said engine, an operatorscontrol valve device comprising an operators lever having a stopposition and at one side thereof ahead start and. run positions and atthe opposite side astern start and run positions, valve means operableby said lever in said start positions to supply fluid under pressure tooperate said reversing means and fuel control means and to provide forsupply of fluid under pressure to said starting control means and beingoperable in said run positions to release fluid under pressure from saidstarting control means and to cutoff the supply of fluid under pressureto said fuel control means and being operable in said stop position to.supply fluid under pressure to said fuel control means, and being alsooperable to cut off the supply of fluid under pressure to said fuelcontrol means with said lever in either start position upon conditioningof said engine by said reversing means to operate in the reversedirection, and interlock means at said engine conditionable by fluidunder pressure supplied to operate said starting control means, to turnupon operation of said engine in the direction provided for by operationof said reversing means to effect operation of said fuel control meansto supply fuel to said engine, said interlock means preventing operationof said fuel control means to provide for supply of fuel to said enginewith said engine operating in the opposite direction.

24. A system for controlling the starting and reversing of an internalcombustion engine and for also controlling the fuel supply to saidengine comprising in combination, reversing means operable to conditionsaid engine for operation in either one direction or in the oppositedirection, starting means operable by fluid under pressure to effectstarting of said engine and being rendered ineffective upon release offluid under pressure; fuel control means operable by fluid underpressure to cut off the supply of fuel to said engine and operable uponrelief of fluid under pressure to provide for supply of fuel to saidengine, an operators control device having one ,position to provide forrunning of said engine in one direction and being movable to a secondposition for effecting a supply of fluid under pressure to said fuelcontrol means and for alsoleffecting operation of said reversing meansto condition said engine for operation in thersaid reverse direction,interlock means controlled by said reversing means and operable uponconditioning of said engine for operation in said reverse direction tosupply fluid under pressure to effect operation of said starting means,and means arranged to be operated by fluid under pressure supplied bysaid interlock means to release fluid under pressure from said fuelcontrol means.

25. A system for controlling the starting and reversing of an internalcombustion engine and for also controlling the fuel supply to saidengine comprising in combination, reversing piston means operable uponsupply of fluid under pressure to one chamber to provide for running ofsaid engine in one direction and operable upon supply of fluid underpressure to a second chamber to provide for running of said enginein thereverse direction, starting means operable by fluid under pressure toeffect starting of said engine and being rendered ineffective uponrelease of fluid under pressure, fuel control means operable to eithersupply fuel to said engine or to cut off the supply of fuel to saidengine, an operators control valve device having one position foreffecting a supply of fluid under pressure to said one chamber and beingmovable from said one position to either a run position or a startposition for supplying fluid under pressure to the said other chamber,means responsive to said movement of said operators control device toeither said run or said start position to effect operation of said fuelcontrol means to cut off the supply of fuel to said engine, interlockmeans controlled by said reversing means operable upon conditioning ofsaid engine for operation in the said reverse direction to supply fluidunder pressure for actuating said starting means, means arranged foroperation by fluid under pressure supplied to actuate said startingmeans to effect operation of said fuel control means to provide forsupply of fuel to said engine, said operators control device beingoperable in said start position to permit said supply of fluid underpressure to said starting means and in said run position to prevent suchsupply and to release fluid under pressure from said starting means.

26. A control system for controlling the starting of a reversibleinternal combustion engine and for also controlling reversing means forsaid engine which is adjustable to determine the direction of operationof said engine comprising in combination, a motor operable by fluidunder pressure to either one of two positions to selectivel adjust saidreversing means, an operators control device having positionscorresponding to said positions of said motor and being operable uponmovement to either one or the other of its two positions to supply fluidunder pressure to said motor to effect corresponding positioning of saidmotor, valve means arranged to control the supply of fluid underpressure to said motor by said operation of said operators controldevice and being operable to cut off such supply and to release fluidunder pressure from said motor, starting means operable by fluid underpressure to effect starting of said engine, interlock mechanism havingtwo different controlling positions for controlling said Valve means andstarting means and being operable in one of said positions to supplyfluid under pressure to effect operation of said starting means and toalso effect operation of said valve means to release fluid underpressure from said motor, and being operable in the other of said twopositions to prevent supply of fluid under pressure to said startingmeans and to effect operation of said valve means to permit supply offluid under pressureto said motor, and connecting means operable by saidmotor upon positioning of said motor corresponding to the position ofsaid operators control device to position said interlock mechanism inits said one controlling position and operable with said motor out ofthe position corresponding to that of said motor to position saidinterlock mechanism in its said other controlling position.

27. A control system for a reversible internal combustion engine's valvegear which is adjustable to provide for operation of said-engine ineither one direction or in the opposite direction comprising incombination, a power piston operable by fluid under pressure to adjustsaid gear, pilot means operable by fluid under pressure to establish acommunication through which fluid under pressure is adapted to flow tosaid power piston to actuate same, valve means controlling saidcommunication, said valve means being operable by fluid under pressureto open said communication and operable upon release of such fluid underpressure to close said communication and to release fluid under pressurefrom said power piston, an operators control device operable toestablish another communication through which fluid under pressure isadapted to flow to said pilot mean and also to said valve means foroperating. said pilot means and valve means, and means controlling flowof fluid under pressure to said other communication and operable uponadjustment of said valve gear by said power piston to cut off the flowof fluid under pressure to said other communication and to -releasefluid under pressure from said other communication. ,1

ROY a. STEVENS. ERIK G. ERSON.

